someonenotyou
Senior Member
Last Activity: Yesterday, 07:11 AM
Joined: 02-27-2021
Location: RIX
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Anyone, please?... -
Hi, could some one, please, clean ME?
HP ProBook 640 G5
S/N 5CG0377X5R
ProdID - 7KP75ET#ABU
BuildID - 19WWCODT601#SABU#DABU
Thank you....Leave a comment:
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Dell G3 3779 bad PCH or EC?
Hi.
I have a Dell G3 3779 (CAL53 LA-F611P), which had a short on +3VALVP and a partial short on +1.8VALWP (27ohm).
For +3VALWP I found a shorted capacitator, that I swapped with a good one. No more short there.
But for the +1.8VALWP I hope it is not PCH. So, what I did:
I removed solder blob from PJP1802 and determined, that the low 27ohm resistance is on pin 2 (+1.8V_PRIM)
I removed UG12 (AOZ1331DI dual channel load switch), and the resistance on +1.8V_PRIM increased to 167ohm.
So, next ICs on the path is EC and PCH. Could any of those be bad?... -
ASUS G513R - cannot remove MOSFET
Hi.
I have a ASUS G513R laptop with shorted MOSFET (MP86959GMW-Z 45A).
I tried to preheat the board to 200C brom the bottom and with rework station set to 400C I flowed it for about 2min. The MOSFET does not come off.
Of course, I did not force it, but tried to lift it up with tweezers.
Is it possible, that these MOSFETs are glues to the board? Or it got welded to the board from the short? It looks intact, no signs of blowing up. -
Hi.
Anyone got boardview and schematics for:
G513R-MV-VENDOR
6050a3348806-MB-A01
Thank you.Leave a comment:
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The markings are:
intersil
9238CH
W213E3...Leave a comment:
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BAT_CON does not give any voltage to the board.
...Leave a comment:
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ASUS E410MA no 5v/3v on board.
Hi.
I have a ASUS laptop with board number E410MA, which does not power up.
By the looks of things, it does not generate 5v, 3v, 1.8v and 1.2v.
The main power rail is there - 19.5V is present and goes to every IC.
By measuring various components, I found these readings:
EC_RST# - 2,7V
RTEST# - 2,8V
RTC_RST# - 2,8V
+VCCRTC_3P3 - 2,85V
+RTCBAT - 3V
P_CHG_VDD_20 - 5V
P_CHG_ACOK_10 - 5V
From the battery I get 3V at RTCBAT, but 0V on main connectors when connected to the board.
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I checked the -DRAMRST is connected to RAM and CPU. Then it goes through R9130 resistor (470ohm) to VCC1R35A.
What I noticed is that VCC1R35A to ground is only 183ohm. Is it not too low? And the -DRAMRST is +470ohm = 653ohm
I desoldered the R9130 resistor and VCC1R35A was still 183ohm and -DRAMRST was 11kOhm.
One more strange thing - while the board was still warm from removing the resistor, the VCC1R35A to ground went to 24ohm. As the board cooled of, the resistance was climbing slowly back to 183ohm.
So, is the 183ohm resistance to ground on VCC1R35A...Leave a comment:
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Thanks. I tried it, but it had the same problem as with original - no sign of life.
Could it be, that NVRAM portion of the original BIOS is bad? Where it stores DMI?...Leave a comment:
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Thank you it worked. But, at the moment, it does not have serial, and MAC address.
Is it possible to transfer BitLocker key from original BIOS to the working one?...Leave a comment:
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Hi.
Could I, please, get a bios for:
ASUS VivaBook M433I
Board model - X421IA Rev2.0
S/N - LCN0CX03N990499
Thank you...Leave a comment:
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Hi. I am having the same issue - powers on, keyboard backlight turns on and off, fan spins, then off, but no post. I tried to flash different BIOSes, with clean ME, tried NVRAM from working BIOS, disable onboard RAM. Nothing worked.
I made the measurements on RAM slot.
Pin 1 (DDR3_VREF_DQ_SB) - 0.68V
Pin 30 (-DRAMRST) - 0,13V
Pin 200 (SMB_DATA_3B) - 3,33V
Pin 202 (SMB_CLK_3B) - 3,33V
What else should I check?
Leave a comment:
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I made some measurements on the EC chip unsoldered.
All the low resistance is coming from the chip itself.
That would mean the chips are low quality, because the resistances are too low, correct?Leave a comment:
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This should be pin 1, then it was soldered correctly....Leave a comment:
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Thank you for the reply.
It was soldered properly, and I checked all the pins under microscope if they were solid and no bridges between pins.
I just desoldered the EC chip to check resistances without it (maybe some broken/shorted traces between layers), but everything seems fine.
+3VA_EC - 33ohm > 135kOhm
+3VPLL - 33ohm > 139kOhm
+3VACC - 33ohm > 142kOhm
Pin 43 (KSO7) - 33ohm > OL
Pin 41 (KSO5) - 10ohm > OL
Pin 33 (OP_SD#) - 3.8ohm > OL
This would indicate wrong/defective chips, correct?
I do not know...Leave a comment:
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ASUS K570U (X570UD) low resistance after EC change
Hi.
I have a ASUS K570U (board model X570UD) which had a bad EC (IT8995E-128 DXS). I ordered 2 new EC chips on AliExpress.
After I changed first chip and powered it on, nothing happened, and I found out that there was a short on +3VA_EC. I desoldered the EC and checked +3VA_EC on board, it had kOhms (cant remember exact number). Then I checked the GND and +3VA_EC on the EC chip itself and they were shorted.
Now, I soldered on the second chip and made measurements on all the pins (I have not powered the board with the new chip yet). And I found these pins... -
HP ProBook 445 G7 no POST only on battery
Hi.
I have a strange problem with HP ProBook 445 G7 (DA0X9MMB8F0 RevF), that there is no POST while only on battery. The Caps Lock blinks 5 times slowly.
When I attach DC Jack, the laptop will charge the battery and switch on.
And now the strange part:
1. While the Windows is still loading, and I will remove the DC Jack, the screen goes blank and the Caps Lock light will start blinking 5 times slowly.
2. When Windows has been loaded and on desktop, when I unplug DC Jack, it will work normally on battery. While still on battery mode I switch the laptop... -
Thank you so much.
Yes, it was the DC Jack, and the pin did not get grounded. The pin supposed to touch the barrel of the charger, was too straight and dirty.
Also, the correct pin was under the circled one. P_A/D_IN_DETECT
So, I desoldered the DC Jack, disassembled it, curved and cleaned the pin, so there is a good contact now.
Again, thank you. Did not think to check for a detect pin on the DC Jack, as I had 19V coming out of it.
...
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